Supercharger



d March 7, 1933- a. R. POYER SUPERGHARGER Filed Feb. 21, 1930 INVENTVOR.

6245/ E Payer T TORNEYJ Patented 7, 1933 GUY B. POYEB, OF WICHITA, KANSAS SUPEBCHABGEB Application fled February 21, 1830. Serial No.

This invention relates to a supercharger for internal combustion engines and the primary object of the invention is to provide means for feeding or supplying a volumetric to the cylinder of the en ine to compensate for the rarefied air in high altitudes and for deficient quantities of fuel during high speed of the engine. It is .well known that internal combustion engines are designed to take the initial charge into the cylinder at about atmospheric pressure and to com ress the charge to about six atmospheres efore firing. In high altitudes, the intake charge is received at less than atmospheric pressure and when the engine is operating at very high speeds, the friction created by the rapidly flowing fuel through the intake manifold prevents the cylinder from becoming entirely filled with fuel so there is not a full charge in the cylinder when the piston begins its compression stroke. My invention contemplates the provision of means for insuring a proper initial pressure within the cylinder irrespective of the atmospheric conditions or;.of the speed at which the engine is operating.

The invention is illustrated in connection with a four stroke cycle engine with the cranks for the two'cylindersangularly coincident and the two cylinders firing alternately.

The novelty of the invention will be understood by reference to the following description in connection with the accompanyingflrawing in which:

ig. 1 is a vertical, longitudinal, sectional view through two cylin ers of an engine constructed in accordance with my invention and Fig. 2 is a sectional view on the line 2-2 of Fig. 1.

The cylinder 1 and the cylinder 2 each have the usual inlet valves and the usual exhaust valves, these being shown in the heads of the cylinders, the inlet and exhaust valves for cylinder 1 being designated 3 and 4 and similar valves 5 and 6 are provided for cylinder 2. The cylinders are provided .with pistons 7 and 8. Piston 7 is of ordinary construction but piston 8 is of novel angle to a bracket 33 on construction in order to carry out my invention. Piston 8 has an elongated split skirt 9 provided'near its lower end with a wrist pin 19 connected in any appropriate manner to the crank rod 11. Near the lower end of the piston 8 are inlet ports 12 adapted to communicate with an air intake pi 13 provided with a throttle valve 14. I elow the intake pipe 13 and within the skirt of the piston 8 is a stationary-solid piston or end wall 15 fastened to the block or c linder 1 by the lugs 16 and 17 which extend t rough the slots 18 and 19 of the piston 8 and which may be fastened to the block or cylinder 1 in any appropriate manner. Therefore, as the piston 8 moves upward with the throttle 14 open, air will be drawn into the air space 20 between the wall 15 and the head of the piston. As the piston 8 moves downwardly, it will compress the air to force it out through the ports 21, through an outlet opening 22 in cylinder 1 into a passage-way 23 m the valve body 24 connected to cylinders 1 and 2.

The valve body carries a three-way valve 25 havingva through port 26 and a branch port 27. hen the valve 25 is in the position shown in Figure 1, air from chamber 20 will be forced into cylinder 2 through the inlet port 28 located just in advance of piston 7 when piston ,7 is at the limit of its intake stroke. When the valve 25 is turned slightly in a clockwise direction to cause the port 27 to register with the port 29 communicating with cylinder 1, port 28 will be covered and air will be forced into cylinder 1, it being understood that piston 8 moves outwardly far enough to uncover port 29.

The valve 25 is provided with a lever 30 connected to a link 31, in turn, connected to one end of an elbow lever 32 pivoted at its the engine block. The other end of the lever 32 is provided with a finger 34 received between the collars 35 and 36 on the push rod 37 which operates the rocker arm 38 for valve 4. The push rod 37 will operate the linkage connected to valve 25 so that port 28 and port 29am. alternately covered and uncovered, that is,"when.the push rod37 is in the position shown 1 to open exhaust valve 4,-then the port-26 combustible communicates the chamber 20 with the cylinder 2 but when the push rod moves to a position to permit spring 39 to close valve 4%, the valve 25 is shifted so that port 28 is closed and cylinder 1 communicates with chamber 20 through ports 21, 22, 23, 27 and 29. There- .fore, the initial pressures are alternately boosted in cylinders 1 and 2. When the engine is operating at relatively low speeds or in low altitudes, the throttle 14 can be closed so the supercharger will not operate for the purpose intended.

While I have referred to the chamber 20 as an air chamber, it is to be understoodthat the purpose of the invention is to add additional volumetric fluid to the combustion chamber under certain conditions so, obviously, this. additional volumetric fluid may consist of a combustible fuel mixture supplied from a suitable source not shown so ll would have itunderstood that my invention contemplates the addition of air as an additional volumetric fluid under certain conditions and under other conditions, the addition of a combustible mixture to augment the supply of fluid admitted through the inlet valve.

I have described in detail the various parts of my invention but it donot wish to be l1m to form an auxiliary fluid chber, means for admitting fluid into the auxiliary chamber, a valve body having a passage-way to communicate the auxiliary-chamber .in one cylinder with the combustion chamber of the other cylinder at the end thereof distant from the inlet valve and the outlet valve, said valve body having a branch passage-way counicating with the auxiliary chamber and with the combustion chamber of the first ned cylinder at the end distant from the inlet valve and the outlet valve and a valve in the valve body for alternately establisg com: munication between the auxiliary chamber and the respective cylinders.

2. A four-cycle internal combustion ee comprising two cylinders, each having an inlet valve and an outlet valve at one end, pistons in the cylinders, the piston in one cylinder having an elongated skirt provided with port openings to register with port openmgs in the cylinder-below the piston head, a stationary wall inside the piston skirt to form an auxiliary chamber, means for a 01in! T34: fluid into the auxiliary her, a valve bod neoasoo ternately establishing communication between the air chamber and the respective cylinders and push-rod actuated means forop j crating said valve.

comprising two cylinders, each having an inlet valve and an outlet valve at one end, a valve body having a port connecting the two cylinders, a piston in one cylinder, a piston in the other cylinder having a shrt provided with ports to aline with the first named port and to aline with an inlet port in the second cylinder, a stationary end wall inside the second mentioned piston to provide an auxiliary chamber in the wall of which the piston ports are located and a valve in the valve body movable to one position to-establish communi- 3. A four-cycle internal combustion engine cation between the auxiliary chamber in the one cylinder and the combustion chamber in the other and movable to another position to establish communication between the auxiliary chamber and the remaining cylinder in advance of the pistontherein.

4. A four-cycle internal combustion engine comprising two cylinders, each having an inlet port and an exhaust port at one end, pistons in the cylinders, the piston in ice one cylinder having an elongated skirt provided with slots, a stationary member spaced from the head of the skirted piston and closing the space within the skirt to form a chamber between the head of the piston and the stationary member, supports on the stationary member extending through the slots of the skirt and supported by the engine block to hold the stationary member in xed position, means for admitting fluidinto the auxiliary chamber through ports in the cylinder and ports in the skirted iston, a valve body having a passa e-way a apted to connect the auxiliary ,cham r in one cylinder with the combustion chamber of the other cylinder and having a branch passageway connecting the auxiliary chamber with the cylinder in which the auxiliary chamber is ice located in advance of the piston and am ne chanically operated valve for intermittently.

establishing communication between the auxQ iliary chamber and the respective cylinders. In testimony whereof l a my signature. GUY R. POYER. 

